Dropbox 為了加速傳輸，在全球到處建機房降低 latency：「Infrastructure Update: Pushing the edges of our global performance」。
就他們測試發現，透過 proxy server 降低 latency 的效果很不錯：
We’ve tested and applied this configuration in various markets in Europe and Asia. In France, for example, median download speeds are 40% faster after introducing proxy servers, while median upload speeds are approximately 90% faster. In Japan, median download speeds have doubled, while median upload speeds are three times as fast.